function lhighlight(number, highlight)
{
	if (highlight) {
		document.getElementsByName("nav_items")[number].src = "/include/images/landing_nav_" + number + "_highlight.png";
	} else {
		document.getElementsByName("nav_items")[number].src = "/include/images/landing_nav_" + number + "_default.png";
	}
}
function highlight(lng, number, highlight)
{
	if (highlight) {
		document.getElementsByName("nav_items")[number].src = "/include/images/nav_" + lng + "_" + number + "_highlight.png";
	} else {
		document.getElementsByName("nav_items")[number].src = "/include/images/nav_" + lng + "_" + number + "_default.png";
	}
}
function popwindow(url)
{
	width = 720;
	height = 600;
	x = (screen.width / 2) - (width / 2);
	y = (screen.height / 2) - (height / 2);
	window.open(url, "DeinvnWebquiz", "left=" + x + ", top=" + y + ", width=" + width + ", height=" + height + ", menubar=no, toolbar=no, scrollbars=yes, status=no");
}